Nice, Waka looks cool! I've talked a bit about the tradeoffs with library-mode pollers, for example here: https://news.ycombinator.com/item?id=39644327. Which isn't to say they don't make sense, but scaling wise I think there can be some drawbacks.
> I'm curious how you're building a money making business around an open source product.
We'd like to make money off of our cloud version. See the comment on pricing here - https://news.ycombinator.com/item?id=39653084 - which also links to other comments about pricing, sorry about that.